In Australia, we mostly get tremors not earthquakes -or well we at least thought that was the case. We smugly assumed that earthquakes happened elsewhere! Australia has long been considered a very dormant continent.
But in 1989, Newcastle (Australia) was rocked with a 5.6 earthquake that killed 13 people ( I just googled to check the facts :doh
This happened over the Christmas school vacation period, which is our long summer break. I had just started doing work as a security guard, and was given the job of minding a new school in a suburb called Plumpton in Sydney's western suburbs, where things are pretty working class and the long school holidays can have kids doing stupid things. The reason I was at the school was to stop the locals from burning down the place before it had even opened!
When the quake hit it sent a tremor down the coastline. In Plumpton, things kinda just gave a hard quick rock. I was sitting in a chair in a school class room and it felt like a blast had pushed me.... I cursed the kids and went out to look at the damage, but there was none. And the air was very quiet, birds all in the air all over the sky and the horses across the road in a paddock all prancing about. Dogs no where to be seen, people nearby walking to their front gate.
The FM radio station I was listening to, momentarily went off air when I felt the push effect. When I walked back inside after what must've been 30 seconds, the station was playing - believe it or not - "I Feel the Earth Move" by Aretha Franklin and on standby mode...
Newcastle is north of Sydney by about 150 miles or so. It took another 10 - 15 minutes for Sydney to realise that an earthquake had happened and that Newcastle had borne the brunt of it.
Where I live now on the Central Coast I am only about 40 miles away (75 kilometres) from Newcastle. My house wasn't built back then so I do not know what would happen if it got rocked that close to an earthquake.
I think the main worrying thing for Australia is our very close location to where some really big geological activity occurs, in Indonesia. A decent earthquake there, or a volcanic eruption could have some serious implications on Australia. Tsunamis coming in from the Indian or Pacific Oceans also pose a threat. I'd reckon if San Francisco ever gets "The Big One' and California disappears into the Pacific ( as some people have mentioned over the years) Australia's most populated coastline (East Coast) would have to buckle down for a huge tsunami on the other side of that Ocean! A decent tsunami on our Eastern coast would cause considerable damage.